Airborne and Allergenic Pollen of North America

Airborne and Allergenic Pollen of North America was the most important book I read (out of hundreds) when I was doing my original research for my own book. The material is extensive, accurate, scientific, and yet it is quite readable. Unlike so many other books, papers, or articles on pollen and allergy, this book takes into consideration all of the plants grown in North America, not just the trees. A classic, and yet, still the very best.